Compact four-channel line switcher that can be used with an extensional footswitch pedal to select one of the four channels (pedal is not included). For example, plug the guitar to the INPUT, send the sound to 4 different amplifiers, and select one of the amplifiers. Or, input 4 audio devices to the unit and select one of them to output. The unit is true-bypass and has an Extra Low Noise Mute function. It can be powered by 9V DC power supply. Operating current: 50 mA. Dimensions: 121 x 84 x 55 mm. Weight: 350 g.